Skip navigation
Universidade Federal da Bahia |
Repositório Institucional da UFBA
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/14962
Tipo: Artigo de Periódico
Título: Influence of the curing method on the post-polymerization shrinkage stress of a composite resin
Título(s) alternativo(s): Journal of Applied Oral Science
Autor(es): Cunha, Leonardo Gonçalves
Alonso, Roberta Caroline Bruschi
Souza Junior, Eduardo José Carvalho de
Neves, Ana Christina Elias Claro
Correr Sobrinho, Lourenço
Sinhoreti, Mário Alexandre Coelho
Autor(es): Cunha, Leonardo Gonçalves
Alonso, Roberta Caroline Bruschi
Souza Junior, Eduardo José Carvalho de
Neves, Ana Christina Elias Claro
Correr Sobrinho, Lourenço
Sinhoreti, Mário Alexandre Coelho
Abstract: The aim of this study was to evaluate the effect of different curing methods on the stress generated by the polymerization shrinkage of a restorative composite in two moments: immediately after light exposure and after 5 min. Photoactivation was performed using two different light sources: (1) xenon plasma arc (PAC) light (1,500 mW/cm2 - 3s) and (2) a quartz-tungsten-halogen (QTH) light with three light-curing regimens: continuous exposure (40 s at 800 mW/cm2 - CL); soft-start (10 s at 150 mW/cm2 and 30 s at 800 mW/cm2 - SS) and intermittent light [cycles of 4 s (2 s with light on at 600 mW/cm2 and 2 s of light off), for 80s - IL]. The composite resin was applied between two 5-mm diameter metallic rods, mounted in a servohydraulic machine. The maximum stress was recorded immediately after light exposure (FF) and after 5 min (5F). The results were submitted to ANOVA and Tukey's test (5%). For each method, the results obtained in FF and 5F were, respectively: CL (3.58 and 4.46 MPa); SS (2.99 and 4.36 MPa); IL (3.11 and 4.32 MPa) and PAC (0.72 and 3.27 MPa). The stress generated by the polymerization shrinkage during light exposure can be associated with the photoactivation method used. A significant increase in the stress level was observed during the post-curing period up to 5 min, for all evaluated methods.
Palavras-chave: Composite resins
Stress
Post-curing
País: Brasil
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/14962
Data do documento: 2008
Aparece nas coleções:Artigo Publicado em Periódico (Faculdade de Odontologia)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
1678-77572008000400007.pdf100,39 kBAdobe PDFVisualizar/Abrir
Mostrar registro completo do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.